My renter wants to purchase my home and said he has a realtor friend who valued it at 269K. My zillow home suddenly had a flag with this same price on it. The flag disappeared when I listed my home for 425K, but the listing still gives a Zillow zestimate of 269K and a square foot price of $125, much lower than the actual price. Was my renter or his realtor somehow able change the square foot value? How can I correct this?